Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4dff0cb3f004467c2a8ee6cf7a9bb3f06de6f545973214cb2db49174a3123fa6' 
  AND token = 'no0iythL4GYas2pKczwYkNGi/y8rYAYy5O1H3O7oeA8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}